package com.example.forum.interceptor;

import com.example.forum.config.AppConfig;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import jakarta.servlet.http.HttpSession;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * 功能描述:
 * 登录拦截器
 * @author Lenovo
 * @date 2024/12/13
 */
@Slf4j
@Component
public class LoginInterceptor implements HandlerInterceptor {
    @Value("${forum.login.url}")
    private String defaultURL;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession(false);
        if(session != null && session.getAttribute(AppConfig.USER_SESSION) != null){
            return true;
        }
        if(!defaultURL.startsWith("/")){
            defaultURL = "/" + defaultURL;
        }
        response.sendRedirect(defaultURL);
        log.info("拦截成功");
        return false;
    }
}
